userportal: quota used by graph doesn't get cleared

There are 2 rulers in quota progress bar, one for 'all' and one for used by you;
When 0% of quota is used, i.e. 'all' and 'by you' are 0%, one of the bars should
be hidden, while the other one gets 100% width with 0%.

Change-Id: Ic15b1ff6d0685b8c3752aa86429ab5802595f953
Bug-Url: https://bugzilla.redhat.com/908809
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>